Overlay and Map Settings
Overlay and Map Settings sets display options for layer data selected in the Overlay Toolbox Layers tab.

To open these settings, click the button for a selected layer.

- The box contains tabs with options for different types of Layers data: Labels, Layer (volume layer settings), Metadata, Palette, Parcels, Trajectory. Tabs will be active (not grayed-out), depending on the data in the File selected for that layer.

- The Do Not Replace option at the bottom of the box allows more than one Settings box to be open at a time. Otherwise, if settings for another layer is selected the contents of the box will switch to options for that most recently selected layer.

- Color Bar contains controls for the adjustment of color bar attributes. Fine tuning of the color bar is performed using the annotation editing features.

- Labels contains an Edit button used for modifying the color and name of labels in a *.label or *.dlabel file. Edits are applied within the session when the Apply or OK buttons are clicked. The edits are not written to the label file until saved in Save/Manage F iles.

- Layer contains voxel drawing settings for files containing volume data. The 3D options to draw voxels as cubes or rounded cubes are only active in All view. These options should only be used for files with a limited number of voxels to draw (*.dscalar files that contain only subcortical voxels, low resolution volumes, or highly thresholded higher resolution volumes) because wb_view attempts to draw all voxels in the volume, causing the program to hang when large numbers of voxels are drawn.

- Metadata will allow creation/editing of map metadata for each layer file. This option is not active currently.

- Palette (see image) contains settings for adjusting the type and range of the data color palette, setting thresholds on displayed data, and shows a histogram/basic statistics on the data distribution.

> - Thresholds set by the sliders or entered values in the toggle box are shown by the shading in the histogram and can be applied inside or outside the set values. The Threshold Source is one of Off (no thresholding), Self (threshold using data from displayed map), or File (allows thresholding using a map from the same or different file). Range controls the minimum and maximum values in the threshold controls. Data Nor malization affects the histogram. When All Maps I n File, the histogram contains data from all maps in the data file. When Sele cted Map in File, the histogram contains the selected map. Outline allows one to draw an outline around thresholded regions using Off (no outlining), Outline Only (Outline is drawn around regions and data within the region is hidden), and Outline Around Data (Outline is drawn around thresholded regions and data within regions is visible). C o lor selects the outline color.

> - Palette spectrum is set for the Full range of the map data, a Percent range of the full data, or a Fixed range of the full data values. Positive, zero, or negative values may be toggled on/off for display with the checkboxes.

> - Mouse controls for zooming and panning are active in the histogram chart field.

> - Data Normalization When Selected Map in File, the histogram and statistics are calculated using the data from the only the selected map. When All Maps in File, the histogram and statistics are calculated using data from all maps in the file and results in a particular value "x" to be colored identically in all maps.
> - Color Bar and Palette Settings The Apply to All Maps checkbox enables the copying of the settings from the selected map to all maps in the data file. Apply to All Files allows the user to copy the current map settings to other loaded data files.

- Parcels sets the mode and color for which an identified parcel is indicated on the surface. Color Mode: Outline indicates the selected parcel's boundary with a highlight color, Fill shows the entire selected parcel with the highlight color, and Off turns off the parcel indication altogether.

- Trajectory sets Attributes, Display Mode, and Data Mapping for display of tractography trajectory files. This tab is currently inactive pending the release of tractography data.